Python Code Snippets and Programming Concepts
HW9: Shift String
Function caesar shifts letters in a string:
def caesar(left, shift):
ref = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
con = ""
letf = left.strip().upper()
for x in range(0, len(left)):
if letf[x] not in ref:
con += letf[x]
else:
con += ref[(ref.find(left[x]) + shift) % 26]
return con CW10: Recursion
Function fib calculates Fibonacci numbers recursively:
def fib(n):
if n in [1, 2]:
return 1
else:
return fib(n - 1)Network Fundamentals: MAC, IP, Routing, and Protocols
1.1. Addressing Physical Layer
To connect a computer to a network, you need a network interface card (NIC) with a unique Media Access Control (MAC) address.
- A MAC address is a 48-bit (12 hexadecimal digits) number.
- Each NIC must have a different MAC address.
- There are approximately 248 (281 trillion) possible MAC addresses.
1.2. Routing Logic and IP Addresses
Your machine uses an Internet Protocol (IP) address for routing. An IP address is composed of 32 bits, grouped into four 8-bit bytes (octets).
Example:
Read More8085 Microprocessor: Flags, Memory, Pipelining, and DMA
What is a Flag Register? 8085 Flags Explained
The Flag Register in the 8085 microprocessor is an 8-bit register reflecting the outcome of arithmetic and logical operations. It contains 5 main flags, each occupying one bit, indicating conditions arising during instruction execution. These flags help the microprocessor make decisions and control operations based on specific conditions.
The 8085 microprocessor has five flags:
1. Zero Flag (Z): Set when the result of an arithmetic or logical operation
Read MoreVTP and Spanning Tree Protocol (STP) for Network Management
VLAN Trunking Protocol (VTP)
VTP allows a network administrator to propagate VLAN configurations across a network.
Benefits of VTP
- Consistency in VLAN configuration.
- Accurate VLAN tracking and monitoring.
- Dynamic reports on added VLANs.
- Dynamic trunk configuration.
VTP automatically synchronizes domain and VLAN configurations. Use show vtp status to display network status and recommended actions.
VTP Modes
- Server: Create, modify, and delete VLANs (default mode).
- Client: Receives and applies VTP information
DHCP Protocol
Introduction
DHCP (Dynamic Host Configuration Protocol) is a TCP/IP layer application. It’s a standard designed to simplify IP address management on a network.
This protocol uses a client/server model, enabling centralized network management. A server maintains a pool of dynamic IP addresses.
The server assigns IP addresses to connecting clients, providing necessary configuration information without prior network knowledge.
The server logs IP address usage, tracking which addresses are in use and for
Read MoreData Protection Rules and Security Measures
Data Protection Rules for Employees
Working with Personal Data Files
- Understand which personal data files are relevant to your job.
- Obtain explicit consent from the individual before processing their data.
- Refrain from using personal data files for unauthorized purposes.
- Report the cessation of use of a specific file.
- Notify the relevant department of any changes to the structure or purpose of Data Protection Commission (DPC) files to ensure GDPR compliance.
- Communicate to the relevant authority when a